Keris lurus for comment and discussion

[Bjorn]

Originally Posted by A. G. Maisey

In older keris the tang is frequently very worn, eroded and thin, then the mendak will turn freely unless it is held in place by pressure from the hilt.

Thank you for the clarification, Alan.
The above part of the quote is the main principle I had in mind, but you managed to express it far more clearly.

Out of curiosity, do you have an illustration of a keris ring? This is the first time I've heard of such a thing.